Hi i am new to hunting and i need some advice on selecting my rifle i have a choice between a .308,.223,.243,.270 and a 30/30 what would be the best for me i want these for deer hunting i have fired a .308 at a target before and that alnost blew me over i am 12 and i have been duck shooting with a semi 12ga shot gun and that was cool so yeah got any advice thanx